Question

What could be the possible ones digit of the squqre root of 9801

Answer 1

hi mate!!!

Solution:

from the numbers 1 to 10,

1×1= 1 and 9× 9= 81

here,

only 1 and 9 are the numbers whose squares have the ones digit of 1.

hence,

numbers like 21, 11 ,31,19 etc have the number one in the ones place in their square.

now,

√9801= 99

hope this helps!!☺✌❤